Which of the following compound can produce Riemann's green with solution?

CHEMISTRY · Single correct · CBSE · Chemistry · Metals and Non-metals · Metals and Non-metals

Problem

Which of the following compound can produce Riemann's green with

\text{Co}(\text{NO}_3)_2

solution? (1)

\text{ZnO}

(2)

3\text{Zn}(\text{OH})_2 \cdot \text{ZnCO}_3

(3)

\text{ZnSO}_4

(4) All of these